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Certified low-particulate 1 Liter (1,000 mL) High-Density Polyethylene (HDPE) plastic bottle with Polypropylene (PP) cap. A sample set from each batch of bottles is certified to not more than 10 particles/mL ≥ 0.7 µm.

Designed as a Performance Qualification (PQ) check standard for the PSS Accusizer™ SPOS SIS instrument with LE400-0.5 sensor; this item contains three (3) different sizes and concentrations of polystryrene latex (PSL) sphere particles.

Designed specifically with USP <729> requirements in mind, this product is used to verify the performance of a Light Obscuration / Extinction instrument equipped with an automated dilution system prior to executing the Method 2 PFAT-5 test.

Designed specifically with USP <729> requirements in mind, this product is used to verify the performance of a manual-dilution Light Obscuration / Extinction instrument prior to executing the Method II PFAT-5 test.

Designed specifically with USP <788> requirements in mind, this product is used to verify the proper performance of a Light Obscuration (LO) particle counting instrument prior to performing the USP <788> Method 1 LO test.